Potentiometer Question - Electronic Circuits Projects Diagrams Free

Alexsgarage · 30th October 2009, 08:23 PM

Is there a way to keep the resistance of a 10K potentiometer inside of a specified range (2K-6K)?

Diver300 · 30th October 2009, 08:41 PM

A potentiometer has constant resistance. The wiper point moves.

If you want a variable resistance, you can use a potentiometer by connecting to the wiper and one end.

To limit to 2kΩ to 6kΩ, you can physically limit the travel, or you can put a 6.666kΩ (6.8kΩ would probably do) in parallel with the potentiometer and a 2kΩ resistor in series with the combination.

Alexsgarage · 30th October 2009, 08:54 PM

Thanks, now it is working perfectly.

Diver300 · 30th October 2009, 09:48 PM

13 minutes from my post to yours saying it is working is good going!

What's it for?

Alexsgarage · 30th October 2009, 11:49 PM

It is for a pulse width modulator, I wanted to prevent the duty cycle from going above or below a certain amount.

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30th October 2009, 08:23 PM	#1
Alexsgarage	Potentiometer Question Is there a way to keep the resistance of a 10K potentiometer inside of a specified range (2K-6K)?

30th October 2009, 08:41 PM	#2
Diver300	A potentiometer has constant resistance. The wiper point moves. If you want a variable resistance, you can use a potentiometer by connecting to the wiper and one end. To limit to 2kΩ to 6kΩ, you can physically limit the travel, or you can put a 6.666kΩ (6.8kΩ would probably do) in parallel with the potentiometer and a 2kΩ resistor in series with the combination. __________________ http://nottheboss.wordpress.com/

30th October 2009, 08:54 PM	#3
Alexsgarage	Thanks, now it is working perfectly.

30th October 2009, 09:48 PM	#4
Diver300	13 minutes from my post to yours saying it is working is good going! What's it for? __________________ http://nottheboss.wordpress.com/

30th October 2009, 11:49 PM	#5
Alexsgarage	It is for a pulse width modulator, I wanted to prevent the duty cycle from going above or below a certain amount.